package com.kreative.openxion.util;

import java.util.Arrays;

/**
 * <b>Bare Bones Browser Launch for Java</b><br>
 * Utility class to open a web page from a Swing application in the user's default browser.<br>
 * Supports: Mac OS X, GNU/Linux, Unix, Windows XP/Vista/7<br>
 * Latest Version: <a href="http://www.centerkey.com/java/browser/">www.centerkey.com/java/browser</a><br>
 * Author: Dem Pilafian<br>
 * Public Domain Software -- Free to Use as You Like
 * @since OpenXION 1.0
 * @version 3.1, June 6, 2010
 */
public class BareBonesBrowserLaunch {
	static final String[] browsers = { "xdg-open", "sensible-browser",
			"google-chrome", "firefox", "opera", "epiphany", "konqueror",
			"conkeror", "midori", "kazehakase", "mozilla" };
	static final String errMsg = "Error attempting to launch web browser";

	/**
	 * Opens the specified web page in the user's default browser
	 * @param url A web address (URL) of a web page (ex: "http://www.google.com/")
	 */
	public static void openURL(String url) {
		try {
			// attempt to use Desktop library from JDK 1.6+
			Class<?> d = Class.forName("java.awt.Desktop");
			d.getDeclaredMethod("browse", new Class[] { java.net.URI.class })
					.invoke(d.getDeclaredMethod("getDesktop").invoke(null),
							new Object[] { java.net.URI.create(url) });
			// above code mimicks: java.awt.Desktop.getDesktop().browse()
		} catch (Exception ignore) {
			// library not available or failed
			String osName = System.getProperty("os.name");
			try {
				if (osName.startsWith("Mac OS")) {
					Class.forName("com.apple.eio.FileManager")
							.getDeclaredMethod("openURL", new Class[] { String.class })
									.invoke(null, new Object[] { url });
				} else if (osName.startsWith("Windows")) {
					Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler " + url);
				} else { // assume Unix or Linux
					String browser = null;
					for (String b : browsers)
						if (browser == null
								&& Runtime.getRuntime().exec(
										new String[] { "which", b })
										.getInputStream().read() != -1)
							Runtime.getRuntime().exec(
									new String[] { browser = b, url });
					if (browser == null)
						throw new Exception(Arrays.toString(browsers));
				}
			} catch (Exception e) {
				throw new RuntimeException(errMsg + "\n" + e.toString());
			}
		}
	}
}
